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Dating ivory

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Age and legality of ivory revealed by carbon-14 dating can fight poachers

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Age and legality of ivory revealed by carbon dating can fight poachers

Scientists examining confiscated elephant tusks say that the majority come from elephants killed within the last three years. November 8, Despite increased awareness and activism seeking to protect wildlife, most illegal ivory likely comes from elephants that were killed by poachers in recent years, a new study has found. Published Monday in the Proceedings of the National Academy of Sciences, the study found that poaching still poses a severe threat to elephants, whose numbers continue to decline. While ivory bans in the US and Europe and a widespread push to protect endangered species have helped to curtail its distribution there, ivory remains popular and profitable in Southeast Asia, which has seen an economic boost that has ushered in a competitive market.
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Carbon-dating ivory

If you have a piece of ivory in your house -- such as a piece of jewelry or a statue -- you might want to identify its authenticity. This ensures that the piece is not made of ivory imitations such as plastic or bone. Look for discoloration.
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University of Utah researchers developed a new weapon to fight poachers who kill elephants, hippos, rhinos and other wildlife. By measuring radioactive carbon deposited in tusks and teeth by open-air nuclear bomb tests, the method reveals the year an animal died, and thus whether the ivory was taken illegally. It was published online the week of July 1 in the journal Proceedings of the National Academy of Sciences. Not only can the method help wildlife forensics to combat poaching, but "we've shown that you can use the signature in animal tissues left over from nuclear weapons testing in the atmosphere to study modern ecology and help us learn about fossil animals and how they lived," says Cerling, a distinguished professor of geology and geophysics, and biology at the University of Utah.

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